./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 32a24617e0b83f023304780397185eef703cdbd26842fbad821fea93a0f1f12f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:02:24,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:02:24,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:02:24,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:02:24,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:02:24,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:02:24,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:02:24,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:02:24,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:02:24,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:02:24,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:02:24,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:02:24,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:02:24,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:02:24,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:02:24,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:02:24,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:02:24,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:02:24,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:02:24,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:02:24,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:02:24,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:02:24,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:02:24,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:02:24,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:02:24,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:02:24,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:02:24,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:02:24,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:02:24,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:02:24,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:02:24,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:02:24,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:02:24,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:02:24,657 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:02:24,657 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:02:24,658 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:02:24,658 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:02:24,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:02:24,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:02:24,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:02:24,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:02:24,711 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:02:24,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:02:24,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:02:24,713 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:02:24,713 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:02:24,713 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:02:24,713 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:02:24,714 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:02:24,714 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:02:24,714 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:02:24,714 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:02:24,714 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:02:24,715 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:02:24,715 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:02:24,715 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:02:24,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:02:24,716 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:02:24,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:02:24,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:02:24,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:02:24,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:02:24,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:02:24,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:02:24,717 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:02:24,717 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:02:24,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:02:24,718 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:02:24,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:02:24,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:02:24,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:02:24,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:02:24,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:02:24,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:02:24,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:02:24,725 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:02:24,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:02:24,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:02:24,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:02:24,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:02:24,726 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32a24617e0b83f023304780397185eef703cdbd26842fbad821fea93a0f1f12f [2021-11-07 01:02:25,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:02:25,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:02:25,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:02:25,047 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:02:25,048 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:02:25,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i [2021-11-07 01:02:25,126 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/data/409b20b41/34ab8d2c60c547f5a6e8324ca52ea7e1/FLAGe9ee867b1 [2021-11-07 01:02:25,695 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:02:25,695 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i [2021-11-07 01:02:25,717 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/data/409b20b41/34ab8d2c60c547f5a6e8324ca52ea7e1/FLAGe9ee867b1 [2021-11-07 01:02:25,924 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/data/409b20b41/34ab8d2c60c547f5a6e8324ca52ea7e1 [2021-11-07 01:02:25,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:02:25,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:02:25,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:02:25,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:02:25,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:02:25,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:02:25" (1/1) ... [2021-11-07 01:02:25,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4198eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:25, skipping insertion in model container [2021-11-07 01:02:25,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:02:25" (1/1) ... [2021-11-07 01:02:25,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:02:26,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:02:26,473 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[33021,33034] [2021-11-07 01:02:26,567 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44124,44137] [2021-11-07 01:02:26,569 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44245,44258] [2021-11-07 01:02:26,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:02:26,599 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:02:26,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f78c5c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:26, skipping insertion in model container [2021-11-07 01:02:26,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:02:26,601 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:02:26,603 INFO L168 Benchmark]: Toolchain (without parser) took 674.16 ms. Allocated memory is still 107.0 MB. Free memory was 61.6 MB in the beginning and 69.4 MB in the end (delta: -7.8 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:02:26,604 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 107.0 MB. Free memory is still 80.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:02:26,604 INFO L168 Benchmark]: CACSL2BoogieTranslator took 671.49 ms. Allocated memory is still 107.0 MB. Free memory was 61.4 MB in the beginning and 69.7 MB in the end (delta: -8.3 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:02:26,606 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 107.0 MB. Free memory is still 80.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 671.49 ms. Allocated memory is still 107.0 MB. Free memory was 61.4 MB in the beginning and 69.7 MB in the end (delta: -8.3 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 716]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 32a24617e0b83f023304780397185eef703cdbd26842fbad821fea93a0f1f12f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:02:28,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:02:28,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:02:28,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:02:28,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:02:28,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:02:28,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:02:28,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:02:28,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:02:28,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:02:28,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:02:28,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:02:28,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:02:28,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:02:28,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:02:28,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:02:28,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:02:28,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:02:28,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:02:28,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:02:28,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:02:28,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:02:28,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:02:28,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:02:28,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:02:28,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:02:28,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:02:28,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:02:28,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:02:28,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:02:28,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:02:28,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:02:28,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:02:28,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:02:28,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:02:28,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:02:28,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:02:28,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:02:28,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:02:28,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:02:28,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:02:28,973 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:02:29,022 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:02:29,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:02:29,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:02:29,024 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:02:29,024 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:02:29,024 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:02:29,025 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:02:29,025 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:02:29,025 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:02:29,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:02:29,028 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:02:29,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:02:29,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:02:29,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:02:29,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:02:29,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:02:29,029 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:02:29,029 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:02:29,030 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:02:29,030 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:02:29,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:02:29,030 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:02:29,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:02:29,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:02:29,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:02:29,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:02:29,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:02:29,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:02:29,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:02:29,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:02:29,032 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:02:29,032 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:02:29,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:02:29,033 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:02:29,033 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:02:29,034 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32a24617e0b83f023304780397185eef703cdbd26842fbad821fea93a0f1f12f [2021-11-07 01:02:29,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:02:29,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:02:29,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:02:29,442 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:02:29,443 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:02:29,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i [2021-11-07 01:02:29,518 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/data/63f0ce3c5/7d46caa613b84eef85820decf7a67dc8/FLAGe9318eb54 [2021-11-07 01:02:30,215 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:02:30,215 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i [2021-11-07 01:02:30,238 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/data/63f0ce3c5/7d46caa613b84eef85820decf7a67dc8/FLAGe9318eb54 [2021-11-07 01:02:30,412 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/data/63f0ce3c5/7d46caa613b84eef85820decf7a67dc8 [2021-11-07 01:02:30,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:02:30,416 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:02:30,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:02:30,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:02:30,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:02:30,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:02:30" (1/1) ... [2021-11-07 01:02:30,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a44d0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:30, skipping insertion in model container [2021-11-07 01:02:30,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:02:30" (1/1) ... [2021-11-07 01:02:30,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:02:30,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:02:30,990 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[33021,33034] [2021-11-07 01:02:31,178 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44124,44137] [2021-11-07 01:02:31,183 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44245,44258] [2021-11-07 01:02:31,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:02:31,225 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:02:31,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:02:31,258 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[33021,33034] [2021-11-07 01:02:31,329 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44124,44137] [2021-11-07 01:02:31,330 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44245,44258] [2021-11-07 01:02:31,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:02:31,349 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:02:31,400 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[33021,33034] [2021-11-07 01:02:31,470 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44124,44137] [2021-11-07 01:02:31,471 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44245,44258] [2021-11-07 01:02:31,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:02:31,552 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:02:31,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:31 WrapperNode [2021-11-07 01:02:31,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:02:31,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:02:31,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:02:31,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:02:31,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:31" (1/1) ... [2021-11-07 01:02:31,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:31" (1/1) ... [2021-11-07 01:02:31,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:02:31,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:02:31,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:02:31,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:02:31,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:31" (1/1) ... [2021-11-07 01:02:31,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:31" (1/1) ... [2021-11-07 01:02:31,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:31" (1/1) ... [2021-11-07 01:02:31,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:31" (1/1) ... [2021-11-07 01:02:31,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:31" (1/1) ... [2021-11-07 01:02:31,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:31" (1/1) ... [2021-11-07 01:02:31,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:31" (1/1) ... [2021-11-07 01:02:31,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:02:31,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:02:31,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:02:31,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:02:31,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:31" (1/1) ... [2021-11-07 01:02:31,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:02:31,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:02:31,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:02:31,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:02:31,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:02:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:02:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:02:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:02:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:02:31,966 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 01:02:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:02:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:02:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:02:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:02:31,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:02:31,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:02:39,410 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:02:39,410 INFO L299 CfgBuilder]: Removed 82 assume(true) statements. [2021-11-07 01:02:39,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:02:39 BoogieIcfgContainer [2021-11-07 01:02:39,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:02:39,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:02:39,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:02:39,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:02:39,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:02:30" (1/3) ... [2021-11-07 01:02:39,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4ffa78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:02:39, skipping insertion in model container [2021-11-07 01:02:39,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:02:31" (2/3) ... [2021-11-07 01:02:39,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4ffa78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:02:39, skipping insertion in model container [2021-11-07 01:02:39,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:02:39" (3/3) ... [2021-11-07 01:02:39,421 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test7-2.i [2021-11-07 01:02:39,427 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:02:39,428 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:02:39,476 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:02:39,482 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:02:39,482 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:02:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 210 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:02:39,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:39,508 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:39,509 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:39,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1366407864, now seen corresponding path program 1 times [2021-11-07 01:02:39,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:39,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149402413] [2021-11-07 01:02:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:39,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:39,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:39,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:39,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:02:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:39,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:02:39,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:39,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:39,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:39,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149402413] [2021-11-07 01:02:39,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149402413] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:39,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:39,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:02:39,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299026792] [2021-11-07 01:02:39,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:02:39,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:39,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:02:39,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:02:39,863 INFO L87 Difference]: Start difference. First operand has 211 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 210 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:39,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:39,923 INFO L93 Difference]: Finished difference Result 419 states and 707 transitions. [2021-11-07 01:02:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:02:39,924 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 01:02:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:39,942 INFO L225 Difference]: With dead ends: 419 [2021-11-07 01:02:39,943 INFO L226 Difference]: Without dead ends: 177 [2021-11-07 01:02:39,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:02:39,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-07 01:02:40,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-07 01:02:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 175 states have (on average 1.3257142857142856) internal successors, (232), 176 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 232 transitions. [2021-11-07 01:02:40,017 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 232 transitions. Word has length 8 [2021-11-07 01:02:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:40,018 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 232 transitions. [2021-11-07 01:02:40,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 232 transitions. [2021-11-07 01:02:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 01:02:40,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:40,019 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:40,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:40,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:40,251 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1136278917, now seen corresponding path program 1 times [2021-11-07 01:02:40,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:40,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278163388] [2021-11-07 01:02:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:40,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:40,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:40,255 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:40,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:02:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:40,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:02:40,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:40,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:40,718 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:40,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278163388] [2021-11-07 01:02:40,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278163388] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:40,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:40,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:02:40,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212362290] [2021-11-07 01:02:40,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:02:40,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:40,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:02:40,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:02:40,727 INFO L87 Difference]: Start difference. First operand 177 states and 232 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:45,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:45,898 INFO L93 Difference]: Finished difference Result 460 states and 606 transitions. [2021-11-07 01:02:45,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:02:45,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 01:02:45,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:45,904 INFO L225 Difference]: With dead ends: 460 [2021-11-07 01:02:45,904 INFO L226 Difference]: Without dead ends: 283 [2021-11-07 01:02:45,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:02:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-07 01:02:45,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2021-11-07 01:02:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 278 states have (on average 1.3273381294964028) internal successors, (369), 279 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 369 transitions. [2021-11-07 01:02:45,926 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 369 transitions. Word has length 10 [2021-11-07 01:02:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:45,930 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 369 transitions. [2021-11-07 01:02:45,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 369 transitions. [2021-11-07 01:02:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:02:45,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:45,934 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:45,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:46,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:46,149 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:46,150 INFO L85 PathProgramCache]: Analyzing trace with hash 627335073, now seen corresponding path program 1 times [2021-11-07 01:02:46,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:46,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055302275] [2021-11-07 01:02:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:46,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:46,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:46,153 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:46,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:02:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:46,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:02:46,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:46,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:46,712 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:46,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055302275] [2021-11-07 01:02:46,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055302275] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:46,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:46,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:02:46,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696037474] [2021-11-07 01:02:46,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:02:46,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:46,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:02:46,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:02:46,715 INFO L87 Difference]: Start difference. First operand 280 states and 369 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:46,877 INFO L93 Difference]: Finished difference Result 450 states and 593 transitions. [2021-11-07 01:02:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:02:46,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:02:46,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:46,882 INFO L225 Difference]: With dead ends: 450 [2021-11-07 01:02:46,882 INFO L226 Difference]: Without dead ends: 302 [2021-11-07 01:02:46,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:02:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-07 01:02:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 286. [2021-11-07 01:02:46,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 284 states have (on average 1.2640845070422535) internal successors, (359), 285 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:46,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 359 transitions. [2021-11-07 01:02:46,934 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 359 transitions. Word has length 44 [2021-11-07 01:02:46,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:46,934 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 359 transitions. [2021-11-07 01:02:46,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 359 transitions. [2021-11-07 01:02:46,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:02:46,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:46,940 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:46,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:47,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:47,156 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:47,157 INFO L85 PathProgramCache]: Analyzing trace with hash -317553387, now seen corresponding path program 1 times [2021-11-07 01:02:47,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:47,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313878806] [2021-11-07 01:02:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:47,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:47,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:47,159 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:47,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:02:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:47,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:02:47,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:47,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:48,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:48,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313878806] [2021-11-07 01:02:48,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313878806] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:48,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:48,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 9 [2021-11-07 01:02:48,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818202122] [2021-11-07 01:02:48,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:02:48,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:48,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:02:48,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:02:48,265 INFO L87 Difference]: Start difference. First operand 286 states and 359 transitions. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:48,420 INFO L93 Difference]: Finished difference Result 442 states and 547 transitions. [2021-11-07 01:02:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:02:48,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:02:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:48,423 INFO L225 Difference]: With dead ends: 442 [2021-11-07 01:02:48,424 INFO L226 Difference]: Without dead ends: 288 [2021-11-07 01:02:48,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:02:48,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-07 01:02:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 274. [2021-11-07 01:02:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 272 states have (on average 1.2463235294117647) internal successors, (339), 273 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 339 transitions. [2021-11-07 01:02:48,435 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 339 transitions. Word has length 44 [2021-11-07 01:02:48,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:48,436 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 339 transitions. [2021-11-07 01:02:48,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 339 transitions. [2021-11-07 01:02:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:02:48,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:48,438 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:48,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:48,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:48,651 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:48,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:48,651 INFO L85 PathProgramCache]: Analyzing trace with hash -575718825, now seen corresponding path program 1 times [2021-11-07 01:02:48,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:48,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118202986] [2021-11-07 01:02:48,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:48,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:48,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:48,655 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:48,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:02:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:49,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:02:49,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:49,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:02:49,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:02:49,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:02:49,150 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 01:02:49,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-07 01:02:49,240 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 01:02:49,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-07 01:02:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:49,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:49,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:49,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118202986] [2021-11-07 01:02:49,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118202986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:49,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:49,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:02:49,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519285870] [2021-11-07 01:02:49,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:02:49,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:49,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:02:49,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:02:49,600 INFO L87 Difference]: Start difference. First operand 274 states and 339 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:58,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:58,514 INFO L93 Difference]: Finished difference Result 557 states and 668 transitions. [2021-11-07 01:02:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:02:58,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:02:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:58,518 INFO L225 Difference]: With dead ends: 557 [2021-11-07 01:02:58,519 INFO L226 Difference]: Without dead ends: 414 [2021-11-07 01:02:58,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:02:58,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-07 01:02:58,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 273. [2021-11-07 01:02:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 271 states have (on average 1.2435424354243543) internal successors, (337), 272 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:58,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 337 transitions. [2021-11-07 01:02:58,533 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 337 transitions. Word has length 44 [2021-11-07 01:02:58,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:58,533 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 337 transitions. [2021-11-07 01:02:58,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 337 transitions. [2021-11-07 01:02:58,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:02:58,536 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:58,536 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:58,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:58,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:58,751 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:58,752 INFO L85 PathProgramCache]: Analyzing trace with hash 858593360, now seen corresponding path program 1 times [2021-11-07 01:02:58,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:58,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716393466] [2021-11-07 01:02:58,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:58,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:58,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:58,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:02:58,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:02:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:02:59,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:02:59,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:02:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:59,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:02:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:02:59,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:02:59,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716393466] [2021-11-07 01:02:59,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716393466] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:02:59,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:02:59,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:02:59,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490079717] [2021-11-07 01:02:59,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:02:59,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:02:59,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:02:59,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:02:59,591 INFO L87 Difference]: Start difference. First operand 273 states and 337 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:02:59,727 INFO L93 Difference]: Finished difference Result 545 states and 679 transitions. [2021-11-07 01:02:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:02:59,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:02:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:02:59,729 INFO L225 Difference]: With dead ends: 545 [2021-11-07 01:02:59,730 INFO L226 Difference]: Without dead ends: 281 [2021-11-07 01:02:59,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:02:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-07 01:02:59,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 279. [2021-11-07 01:02:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 277 states have (on average 1.1805054151624548) internal successors, (327), 278 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 327 transitions. [2021-11-07 01:02:59,743 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 327 transitions. Word has length 69 [2021-11-07 01:02:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:02:59,745 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 327 transitions. [2021-11-07 01:02:59,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:02:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 327 transitions. [2021-11-07 01:02:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:02:59,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:02:59,750 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:02:59,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:02:59,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:02:59,969 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:02:59,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:02:59,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1300403396, now seen corresponding path program 1 times [2021-11-07 01:02:59,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:02:59,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82515800] [2021-11-07 01:02:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:02:59,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:02:59,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:02:59,973 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:00,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:03:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:00,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:03:00,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:00,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:03:00,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:00,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82515800] [2021-11-07 01:03:00,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82515800] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:00,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:03:00,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:03:00,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968868183] [2021-11-07 01:03:00,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:03:00,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:00,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:03:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:00,795 INFO L87 Difference]: Start difference. First operand 279 states and 327 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:00,879 INFO L93 Difference]: Finished difference Result 516 states and 611 transitions. [2021-11-07 01:03:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:03:00,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:03:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:00,882 INFO L225 Difference]: With dead ends: 516 [2021-11-07 01:03:00,882 INFO L226 Difference]: Without dead ends: 282 [2021-11-07 01:03:00,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:03:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-07 01:03:00,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2021-11-07 01:03:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 280 states have (on average 1.1785714285714286) internal successors, (330), 281 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:00,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 330 transitions. [2021-11-07 01:03:00,914 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 330 transitions. Word has length 69 [2021-11-07 01:03:00,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:00,916 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 330 transitions. [2021-11-07 01:03:00,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:00,916 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 330 transitions. [2021-11-07 01:03:00,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:03:00,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:00,918 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:00,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:01,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:03:01,134 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:01,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:01,134 INFO L85 PathProgramCache]: Analyzing trace with hash 982130832, now seen corresponding path program 1 times [2021-11-07 01:03:01,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:01,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371205356] [2021-11-07 01:03:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:01,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:01,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:01,140 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:01,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:03:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:01,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:03:01,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:03:01,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:03:02,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:02,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371205356] [2021-11-07 01:03:02,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371205356] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:02,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1434983336] [2021-11-07 01:03:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:02,030 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:02,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:03:02,033 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:03:02,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 01:03:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:02,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:03:02,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:03:02,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:03:03,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1434983336] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:03,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28244892] [2021-11-07 01:03:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:03,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:03,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:03,056 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:03:03,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 01:03:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:03,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:03:03,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:03,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:03,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:03,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:03:03,760 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 01:03:03,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-07 01:03:03,862 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 01:03:03,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-07 01:03:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:03:03,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:03:04,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28244892] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:04,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:03:04,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-07 01:03:04,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682555062] [2021-11-07 01:03:04,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:03:04,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:04,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:03:04,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:03:04,092 INFO L87 Difference]: Start difference. First operand 282 states and 330 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:15,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:15,573 INFO L93 Difference]: Finished difference Result 423 states and 493 transitions. [2021-11-07 01:03:15,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:03:15,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:03:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:15,577 INFO L225 Difference]: With dead ends: 423 [2021-11-07 01:03:15,578 INFO L226 Difference]: Without dead ends: 419 [2021-11-07 01:03:15,578 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:03:15,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-11-07 01:03:15,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 284. [2021-11-07 01:03:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 282 states have (on average 1.177304964539007) internal successors, (332), 283 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 332 transitions. [2021-11-07 01:03:15,592 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 332 transitions. Word has length 72 [2021-11-07 01:03:15,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:15,592 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 332 transitions. [2021-11-07 01:03:15,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 332 transitions. [2021-11-07 01:03:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:03:15,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:15,594 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:15,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:15,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 01:03:15,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-07 01:03:16,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:16,196 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:16,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:16,196 INFO L85 PathProgramCache]: Analyzing trace with hash -786181332, now seen corresponding path program 1 times [2021-11-07 01:03:16,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:16,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373225778] [2021-11-07 01:03:16,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:16,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:16,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:16,198 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:16,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:03:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:16,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:03:16,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:03:17,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:03:17,355 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:17,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373225778] [2021-11-07 01:03:17,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373225778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:17,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2115828268] [2021-11-07 01:03:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:17,356 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:17,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:03:17,371 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:03:17,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-07 01:03:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:18,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:03:18,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:03:18,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:03:18,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2115828268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:03:18,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:03:18,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:03:18,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882786734] [2021-11-07 01:03:18,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:03:18,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:18,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:03:18,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:03:18,967 INFO L87 Difference]: Start difference. First operand 284 states and 332 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:23,744 INFO L93 Difference]: Finished difference Result 605 states and 712 transitions. [2021-11-07 01:03:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:03:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 01:03:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:23,748 INFO L225 Difference]: With dead ends: 605 [2021-11-07 01:03:23,748 INFO L226 Difference]: Without dead ends: 366 [2021-11-07 01:03:23,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:03:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-07 01:03:23,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 359. [2021-11-07 01:03:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 357 states have (on average 1.1820728291316527) internal successors, (422), 358 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 422 transitions. [2021-11-07 01:03:23,766 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 422 transitions. Word has length 106 [2021-11-07 01:03:23,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:23,766 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 422 transitions. [2021-11-07 01:03:23,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 422 transitions. [2021-11-07 01:03:23,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 01:03:23,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:23,768 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:23,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:23,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:24,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:24,185 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:24,186 INFO L85 PathProgramCache]: Analyzing trace with hash 530496366, now seen corresponding path program 1 times [2021-11-07 01:03:24,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:24,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135226278] [2021-11-07 01:03:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:24,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:24,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:24,187 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:24,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:03:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:24,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:03:24,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:03:25,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:03:25,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:25,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135226278] [2021-11-07 01:03:25,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135226278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:25,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [851874753] [2021-11-07 01:03:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:25,529 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:25,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:03:25,530 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:03:25,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 01:03:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:26,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:03:26,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:03:26,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:03:26,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [851874753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:26,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613071665] [2021-11-07 01:03:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:03:26,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:26,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:26,987 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:03:26,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 01:03:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:03:27,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:03:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:03:28,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:03:28,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613071665] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:28,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:03:28,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 10 [2021-11-07 01:03:28,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12971296] [2021-11-07 01:03:28,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:03:28,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:28,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:03:28,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:03:28,257 INFO L87 Difference]: Start difference. First operand 359 states and 422 transitions. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:28,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:28,534 INFO L93 Difference]: Finished difference Result 676 states and 805 transitions. [2021-11-07 01:03:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:03:28,537 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-07 01:03:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:28,539 INFO L225 Difference]: With dead ends: 676 [2021-11-07 01:03:28,539 INFO L226 Difference]: Without dead ends: 367 [2021-11-07 01:03:28,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 666 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:03:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-07 01:03:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2021-11-07 01:03:28,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 365 states have (on average 1.178082191780822) internal successors, (430), 366 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:28,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 430 transitions. [2021-11-07 01:03:28,557 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 430 transitions. Word has length 113 [2021-11-07 01:03:28,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:28,557 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 430 transitions. [2021-11-07 01:03:28,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:28,558 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 430 transitions. [2021-11-07 01:03:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 01:03:28,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:28,559 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:28,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:28,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:28,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:29,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:29,163 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:29,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:29,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1097324242, now seen corresponding path program 2 times [2021-11-07 01:03:29,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:29,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450089102] [2021-11-07 01:03:29,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:03:29,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:29,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:29,167 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:29,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:03:30,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:03:30,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:03:30,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:03:30,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 01:03:30,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 01:03:31,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:31,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450089102] [2021-11-07 01:03:31,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450089102] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:31,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2059222114] [2021-11-07 01:03:31,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:03:31,195 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:31,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:03:31,196 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:03:31,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 01:03:32,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:03:32,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:03:32,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:03:32,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 01:03:33,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 01:03:33,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2059222114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:33,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916245278] [2021-11-07 01:03:33,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:03:33,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:03:33,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:03:33,687 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:03:33,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 01:03:34,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:03:34,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:03:34,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:03:34,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:03:35,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:03:36,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916245278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:36,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:03:36,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 8, 8] total 27 [2021-11-07 01:03:36,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373894314] [2021-11-07 01:03:36,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 01:03:36,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:03:36,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 01:03:36,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:03:36,255 INFO L87 Difference]: Start difference. First operand 367 states and 430 transitions. Second operand has 27 states, 27 states have (on average 5.296296296296297) internal successors, (143), 27 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:39,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:03:39,972 INFO L93 Difference]: Finished difference Result 1003 states and 1202 transitions. [2021-11-07 01:03:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:03:39,975 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.296296296296297) internal successors, (143), 27 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-07 01:03:39,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:03:39,979 INFO L225 Difference]: With dead ends: 1003 [2021-11-07 01:03:39,979 INFO L226 Difference]: Without dead ends: 690 [2021-11-07 01:03:39,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 702 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 01:03:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-07 01:03:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 389. [2021-11-07 01:03:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 387 states have (on average 1.1705426356589148) internal successors, (453), 388 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 453 transitions. [2021-11-07 01:03:40,007 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 453 transitions. Word has length 121 [2021-11-07 01:03:40,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:03:40,007 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 453 transitions. [2021-11-07 01:03:40,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.296296296296297) internal successors, (143), 27 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:03:40,008 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 453 transitions. [2021-11-07 01:03:40,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:03:40,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:03:40,009 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:03:40,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:40,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:40,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:03:40,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:40,631 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:03:40,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:03:40,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1558698834, now seen corresponding path program 3 times [2021-11-07 01:03:40,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:03:40,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501250656] [2021-11-07 01:03:40,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:03:40,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:03:40,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:03:40,633 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:03:40,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:03:48,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 01:03:48,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:03:48,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:03:48,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:03:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 01:03:49,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:03:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 01:03:51,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:03:51,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501250656] [2021-11-07 01:03:51,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501250656] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:03:51,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [431365939] [2021-11-07 01:03:51,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:03:51,182 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:03:51,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:03:51,184 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:03:51,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:04:40,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 01:04:40,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:04:40,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:04:40,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 01:04:41,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-07 01:04:41,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [431365939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:04:41,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459526455] [2021-11-07 01:04:41,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:04:41,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:04:41,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:04:41,885 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:04:41,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b624173-5882-4c7f-a427-0727fb0bd79c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process